Tohutoro APA (7th ed.)

Spector, P. E. (1981). Research designs. Sage Publications.

Tohutoru Kātū Chicago (17th ed.)

Spector, Paul E. Research Designs. Beverly Hills: Sage Publications, 1981.

Tohutoro MLA (9th ed.)

Spector, Paul E. Research Designs. Sage Publications, 1981.