APA aipamena

Milligan, J. E. (1974). Celestial navigation by H.O.249. Maritime press.

Chicago Style aipamena

Milligan, John E. Celestial Navigation by H.O.249. Cambridge: Maritime press, 1974.

MLA aipamena

Milligan, John E. Celestial Navigation by H.O.249. Maritime press, 1974.