Gaya APA

Swanson, C, P., Fehr, H, F. (1951). Secondary mathematics a functional approach for teachers . Boston: Boston: D.C. Heath and Co.; 1951..

Gaya MLA

Swanson, Carl, P.., Fehr, Howard, F.. "Secondary mathematics a functional approach for teachers". Boston: Boston: D.C. Heath and Co.; 1951., 1951. Text.