Cita APA (7a ed.)

Hjelmström, S., & Whyte, H. (1968). Say what you mean: Book one (1a. ed.). Longmans.

Cita Chicago Style (17a ed.)

Hjelmström, Svante, y Henry Whyte. Say What You Mean: Book One. 1a. ed. Londres: Longmans, 1968.

Cita MLA (9a ed.)

Hjelmström, Svante, y Henry Whyte. Say What You Mean: Book One. 1a. ed. Longmans, 1968.