Παραπομπή APA

Higgins, P. J. (1974). Introduction to topological groups. Cambridge University Press.

Παραπομπή Chicago Style

Higgins, Philip J. Introduction to Topological Groups. Cambridge: Cambridge University Press, 1974.

Παραπομπή MLA

Higgins, Philip J. Introduction to Topological Groups. Cambridge University Press, 1974.