Cita APA (7a ed.)

Carlsen, G. R., Tovatt, A., & Tovatt, P. O. (1969). Focus: Themes in literature. Webster Division, McGraw-Hill.

Cita Chicago Style (17a ed.)

Carlsen, G. Robert, Anthony Tovatt, y Patricia O. Tovatt. Focus: Themes in Literature. New York: Webster Division, McGraw-Hill, 1969.

Cita MLA (9a ed.)

Carlsen, G. Robert, et al. Focus: Themes in Literature. Webster Division, McGraw-Hill, 1969.