APA (7th ed.) Zitazioa

(1974). The changing concepts of reference service / Suseela Kumar.

Chicago Style (17th ed.) Zitazioa

The Changing Concepts of Reference Service / Suseela Kumar. 1974.

MLA (9th ed.) Zitazioa

The Changing Concepts of Reference Service / Suseela Kumar. 1974.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.