Cita APA (7th ed.)

Walker, H. M. (1951). Mathematics essential for elementary statistics: A self-teaching manual. Holt, Rinehart & Winston.

Cita Chicago (17th ed.)

Walker, Helen Mary. Mathematics Essential for Elementary Statistics: A Self-teaching Manual. New York: Holt, Rinehart & Winston, 1951.

Cita MLA (9th ed.)

Walker, Helen Mary. Mathematics Essential for Elementary Statistics: A Self-teaching Manual. Holt, Rinehart & Winston, 1951.