Παραπομπή APA

Dempsey, M. W. (1970). Purnell's concise encyclopedia in colour. Purnell.

Παραπομπή Chicago Style

Dempsey, Michael W. Purnell's Concise Encyclopedia in Colour. London: Purnell, 1970.

Παραπομπή MLA

Dempsey, Michael W. Purnell's Concise Encyclopedia in Colour. Purnell, 1970.