Παραπομπή APA

(1970). Hutchinson's new 20th century encyclopaedia. Hutchinson.

Παραπομπή Chicago Style

Hutchinson's New 20th Century Encyclopaedia. London: Hutchinson, 1970.

Παραπομπή MLA

Hutchinson's New 20th Century Encyclopaedia. Hutchinson, 1970.