Cita APA (7th ed.)

Okada, S. (2000). Mathematics for elementary school, 2nd grade. Gakkoh Tosho.

Cita Chicago (17th ed.)

Okada, Shigeru. Mathematics for Elementary School, 2nd Grade. Tokio: Gakkoh Tosho, 2000.

Cita MLA (9th ed.)

Okada, Shigeru. Mathematics for Elementary School, 2nd Grade. Gakkoh Tosho, 2000.