APA aipamena

Walker, H. M. (1951). Mathematics essential for elementary statistics: A self teaching manual.

Chicago Style aipamena

Walker, Helen M. Mathematics Essential for Elementary Statistics: A Self Teaching Manual. Oxford & IBH Publishing Co. Pvt. Ltd., New Delhi, 1951.

MLA aipamena

Walker, Helen M. Mathematics Essential for Elementary Statistics: A Self Teaching Manual. 1951.