APA استشهاد

Budlong, J. P. (1978). Sky and sextant (2d ed.). Van Nostrand Reinhold.

استشهاد بنمط شيكاغو

Budlong, John P. Sky and Sextant. 2d ed. New York: Van Nostrand Reinhold, 1978.

MLA استشهاد

Budlong, John P. Sky and Sextant. 2d ed. Van Nostrand Reinhold, 1978.