Cita APA (7a ed.)

Periodical Publishers Association, editor. (1993). Best practices guidelines for special advertising opportunities within magazines (1st pub.). PPA.

Cita Chicago Style (17a ed.)

Periodical Publishers Association, editor. Best Practices Guidelines for Special Advertising Opportunities Within Magazines. 1st pub. London: PPA, 1993.

Cita MLA (9a ed.)

Periodical Publishers Association, editor. Best Practices Guidelines for Special Advertising Opportunities Within Magazines. 1st pub. PPA, 1993.