Cita APA (7th ed.)

KRAMER, K. (1978). Teaching elementary school mathematics.-- Ed.4. Allyn and Bacon.

Cita Chicago (17th ed.)

KRAMER, Klaas. Teaching Elementary School Mathematics.-- Ed.4. Boston: Allyn and Bacon, 1978.

Cita MLA (9th ed.)

KRAMER, Klaas. Teaching Elementary School Mathematics.-- Ed.4. Allyn and Bacon, 1978.