APA ציטוט

Walker, H. M. (1951). Mathematics Essential for Elementary Statistics. New York: Henry Holt.

Trích dẫn kiểu Chicago

Walker, Helen M. Mathematics Essential for Elementary Statistics. New York: Henry Holt, 1951.

ציטוט MLA

Walker, Helen M. Mathematics Essential for Elementary Statistics. New York: Henry Holt, 1951.