Comma with dates

The third ACS-approved approach to citing the literature is to use authors last names and year of publication (author name, year). This format is relatively uncommon in ACS journals but is frequently used in journals of other scientihc disciplines, such as Ecology and Reviews of Modern Physics. With the author—date citation technique, the authors last names, followed by a comma, a space, and the year of publication are placed in parentheses (or brackets in some journals). Publications with three or more authors are referred to by the last name of the first author, followed by et ah, a comma, and the year. Multiple citations are separated by semicolons and listed in alphabetical order (by first author). 

For nonscientific magazines and other periodicals that are not abstracted by Chemical Abstracts Service, give the authors names in inverted form ending with a period, the article title in roman type with main words capitalized and ending with a period, the full magazine title in italic type followed by a comma in italic type, the complete date of the issue (see pp 160-161 about dates) ending with a comma, and the pagination. 

For the U.S. Government Printing Office, it is always Washington, DC. The held ends with a comma preceding the date of publication. 

Treat the name of the law as a chapter title (roman, terminated with a period). No publisher name is needed. The number and date of the law are separated by a comma. If additional publication information is given, it is preceded by a semicolon. 

The format resembles that of a book citation. The title field, however, includes additional information on the meeting title, location, and dates. The actual title of the book (collected work) is set in italic type and is separated from the meeting information by a comma. The information on meeting location is set in roman type, but it is not repeated if it is included in the book title. The entire field ends with a semicolon. 

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