Garland, G. D. (1965). Earth's shape and gravity. Pergamon press.
Chicago Style aipamenaGarland, G. D. Earth's Shape and Gravity. New york: Pergamon press, 1965.
MLA aipamenaGarland, G. D. Earth's Shape and Gravity. Pergamon press, 1965.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.