Cita APA (7a ed.)

King, C., & Stanley, N. (1989). Building skills for the TOEFL: Tapescript and key (2nd ed.). [s.n].

Cita Chicago Style (17a ed.)

King, Carol, y Nancy Stanley. Building Skills for the TOEFL: Tapescript and Key. 2nd ed. NelSon, U.K: [s.n], 1989.

Cita MLA (9a ed.)

King, Carol, y Nancy Stanley. Building Skills for the TOEFL: Tapescript and Key. 2nd ed. [s.n], 1989.