APA
Berger P. L., . (1971). Invitation to sociology : a humanistic perspective. Harmondsworth: Penguin Books.
Chicago
Berger Peter L, . 1971. Invitation to sociology : a humanistic perspective. Harmondsworth: Penguin Books.
Harvard
Berger P. L., . (1971). Invitation to sociology : a humanistic perspective. Harmondsworth: Penguin Books.
MLA
Berger Peter L, . Invitation to sociology : a humanistic perspective. Harmondsworth: Penguin Books. 1971.
