Παραπομπή APA

Blewitt, M. (1973). Celestial navigation for yachtsmen (5th ed.). Stanford.

Παραπομπή Chicago Style

Blewitt, Mary. Celestial Navigation for Yachtsmen. 5th ed. London: Stanford, 1973.

Παραπομπή MLA

Blewitt, Mary. Celestial Navigation for Yachtsmen. 5th ed. Stanford, 1973.