Gaya APA

Swanson, C, P., Gallian, J, A. (1990). **Contemporary abstract algebra . Masschusetts: Masschusetts: D.C. Heathand Co.; 1990..

Gaya MLA

Swanson, Carl, P.., Gallian, Joseph, A.. "**Contemporary abstract algebra". Masschusetts: Masschusetts: D.C. Heathand Co.; 1990., 1990. Text.