APA

Stretton H., . (1969). Political sciences. : Routledge & Kegan Paul Ltd., London.

Chicago

Stretton Hugh, . 1969. Political sciences. : Routledge & Kegan Paul Ltd., London.

Harvard

Stretton H., . (1969). Political sciences. : Routledge & Kegan Paul Ltd., London.

MLA

Stretton Hugh, . Political sciences. : Routledge & Kegan Paul Ltd., London. 1969.