Gaya APA

Vallen, J, J. (1976). Check in-check out : principles of effective front office management (2nd printing). Dubuque, Iowa: WM. C. Brown Company Publishers.

Gaya MLA

Vallen, Jerome, J.. "Check in-check out : principles of effective front office management". 2nd printing Dubuque, Iowa: WM. C. Brown Company Publishers, 1976. BUKU.