APA (7th ed.) Citation

Sless, D. (1981). Learning and visual communication. Croom Helm [u.a.].

Chicago Style (17th ed.) Citation

Sless, David. Learning and Visual Communication. London: Croom Helm [u.a.], 1981.

MLA (9th ed.) Citation

Sless, David. Learning and Visual Communication. Croom Helm [u.a.], 1981.