Cita APA (7th ed.)

Steffensen, A. R., & Johnson, L. M. (1982). Fundamentals of mathematics (ed.). Scott, foresman.

Cita Chicago (17th ed.)

Steffensen, Arnold R., i L. Murphy Johnson. Fundamentals of Mathematics. ed. Illinois: Scott, foresman, 1982.

Cita MLA (9th ed.)

Steffensen, Arnold R., i L. Murphy Johnson. Fundamentals of Mathematics. ed. Scott, foresman, 1982.