APA-referens (7:e uppl.)

Silverio, J. F. (1997). Book of questions and answers. M & L Licudine Enterprises.

Chicago-referens (17:e uppl.)

Silverio, Julio F. Book of Questions and Answers. Las Pinas, Metro Manila: M & L Licudine Enterprises, 1997.

MLA-referens (9:e uppl.)

Silverio, Julio F. Book of Questions and Answers. M & L Licudine Enterprises, 1997.