Παραπομπή σε μορφή APA (7η εκδ.)

Chrystal, G. (1964). Algebra: An elementary text book for the higher classes of secondary schools and for colleges (7th ed.). Chelsea.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Chrystal, G. Algebra: An Elementary Text Book for the Higher Classes of Secondary Schools and for Colleges. 7th ed. New York: Chelsea, 1964.

Παραπομπή σε μορφή MLA (8th εκδ.)

Chrystal, G. Algebra: An Elementary Text Book for the Higher Classes of Secondary Schools and for Colleges. 7th ed. Chelsea, 1964.