Cita APA (7a ed.)

King, C., & Stanley, N. (1989). Building skills for the toefl (2a ed.). Nelson.

Cita Chicago Style (17a ed.)

King, Carol, y Nancy Stanley. Building Skills for the Toefl. 2a ed. Hong Kong: Nelson, 1989.

Cita MLA (9a ed.)

King, Carol, y Nancy Stanley. Building Skills for the Toefl. 2a ed. Nelson, 1989.