APA aipamena

Van Duyn, J. (1975). Practical systems and procedures manual. Reston.

Chicago Style aipamena

Van Duyn, Julia. Practical Systems and Procedures Manual. Reston, 1975.

MLA aipamena

Van Duyn, Julia. Practical Systems and Procedures Manual. Reston, 1975.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.