Παραπομπή APA

Barrett, N. [. (1975). Purnell's illustrated nature atlas. Purmell.

Παραπομπή Chicago Style

Barrett, Norman [ed.]. Purnell's Illustrated Nature Atlas. Berkshire: Purmell, 1975.

Παραπομπή MLA

Barrett, Norman [ed.]. Purnell's Illustrated Nature Atlas. Purmell, 1975.