Cita APA (7th ed.)

Hartung, M. L., Eugen, H. V., & Knowles, L. (1960). Seeing through arithmetic: Special book A. Scott.

Cita Chicago (17th ed.)

Hartung, Maurice Leslie, Henry Van Eugen, i Lois Knowles. Seeing Through Arithmetic: Special Book A. Chicago: Scott, 1960.

Cita MLA (9th ed.)

Hartung, Maurice Leslie, et al. Seeing Through Arithmetic: Special Book A. Scott, 1960.