Gaya APA

Krug, M, M. (1967). History and the Social Sciences ; New Approaches to the Teaching of Social Studies (Ed.1). London: Blaisdell Publishing Company.

Gaya MLA

Krug, Mark, M.. "History and the Social Sciences ; New Approaches to the Teaching of Social Studies". Ed.1 London: Blaisdell Publishing Company, 1967. Text.