APA

National Society for the Study of Education, Whipple G. M. & Parkins A. E. (1933). The teaching of geography. Bloomington, Ill: Public School Publishing Company.

Chicago

National Society for the Study of Education, Whipple Guy Montrose and Parkins Almon Ernest. 1933. The teaching of geography. Bloomington, Ill: Public School Publishing Company.

Harvard

National Society for the Study of Education, Whipple G. M. and Parkins A. E. (1933). The teaching of geography. Bloomington, Ill: Public School Publishing Company.

MLA

National Society for the Study of Education, Whipple Guy Montrose and Parkins Almon Ernest. The teaching of geography. Bloomington, Ill: Public School Publishing Company. 1933.