Cita APA (7th ed.)

Kenny, N. (1998). First Certificatew Pass Key: Student's book. Macmillan Heinemann.

Cita Chicago (17th ed.)

Kenny, Nick. First Certificatew Pass Key: Student's Book. Inglaterra: Macmillan Heinemann, 1998.

Cita MLA (9th ed.)

Kenny, Nick. First Certificatew Pass Key: Student's Book. Macmillan Heinemann, 1998.