Cita APA (7a ed.)

Fried-Booth, D. L. (1991). Focus on P.E.T: Preliminary English Test : Teacher's book. Collins ELT.

Cita Chicago Style (17a ed.)

Fried-Booth, Diana L. Focus on P.E.T: Preliminary English Test : Teacher's Book. London: Collins ELT, 1991.

Cita MLA (9a ed.)

Fried-Booth, Diana L. Focus on P.E.T: Preliminary English Test : Teacher's Book. Collins ELT, 1991.