APA način citiranja (7. izdanje)

Villanueva, P. M. (1989). English skills for college freshmen. Katha Pub.

Čikaški stil citiranja (17. izdanje)

Villanueva, Perla M. English Skills for College Freshmen. Quezon City: Katha Pub, 1989.

MLA način citiranja (9. izdanje)

Villanueva, Perla M. English Skills for College Freshmen. Katha Pub, 1989.