Cita APA (7th ed.)
Sanderson, B. A., & Kratochvil, D. W. (1972). Holt social studies curriculum.
Cita Chicago (17th ed.)
Sanderson, Barbara A., i Daniel W. Kratochvil. Holt Social Studies Curriculum. 1972.
Cita MLA (9th ed.)
Sanderson, Barbara A., i Daniel W. Kratochvil. Holt Social Studies Curriculum. 1972.
Atenció: Aquestes cites poden no estar 100% correctes.