Παραπομπή APA

Wheeler, H. E. (1990). Illustrated encyclopaedia of the world knowledge.

Παραπομπή Chicago Style

Wheeler, Harold; Ed. Illustrated Encyclopaedia of the World Knowledge. New Delhi, Anmol, 1990.

Παραπομπή MLA

Wheeler, Harold; Ed. Illustrated Encyclopaedia of the World Knowledge. 1990.