APA ציטוט

Ashton, S. Pet preliminary English test practice tests plus 2 with key. New York: Longman.

Trích dẫn kiểu Chicago

Ashton, Sharon. Pet Preliminary English Test Practice Tests Plus 2 With Key. New York: Longman.

ציטוט MLA

Ashton, Sharon. Pet Preliminary English Test Practice Tests Plus 2 With Key. New York: Longman.