APA-referens (7:e uppl.)

Bardell, R. H. (1969). Essentials of algebra. Addison-Wesley Publishing Co.

Chicago-referens (17:e uppl.)

Bardell, Ross H. Essentials of Algebra. Reading, Massachusetts: Addison-Wesley Publishing Co, 1969.

MLA-referens (9:e uppl.)

Bardell, Ross H. Essentials of Algebra. Addison-Wesley Publishing Co, 1969.