Παραπομπή σε μορφή APA (7η εκδ.)

Hua, L. (1981). Starting with the unit circle: Background to higher analysis : with 6 illustrations. Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hua, Luogeng. Starting with the Unit Circle: Background to Higher Analysis : With 6 Illustrations. New York: Springer, 1981.

Παραπομπή σε μορφή MLA (8th εκδ.)

Hua, Luogeng. Starting with the Unit Circle: Background to Higher Analysis : With 6 Illustrations. Springer, 1981.