APA

Ledermann W., . (1973). Introduction to group theory. New York: Barnes and Noble.

Chicago

Ledermann Walter, . 1973. Introduction to group theory. New York: Barnes and Noble.

Harvard

Ledermann W., . (1973). Introduction to group theory. New York: Barnes and Noble.

MLA

Ledermann Walter, . Introduction to group theory. New York: Barnes and Noble. 1973.