Παραπομπή σε μορφή APA (7η εκδ.)

Chrystal, G. (1952). Algebra: An elementary text-book for the higher classes of secondary schools and for colleges (6th 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. 6th ed. New York: Chelsea, 1952.

Παραπομπή σε μορφή MLA (9th εκδ.)

Chrystal, G. Algebra: An Elementary Text-book for the Higher Classes of Secondary Schools and for Colleges. 6th ed. Chelsea, 1952.