APA
Bulman O. M. B., . (1961). Geology inthe service of man # Geology in the service of man. Australia: Penguin Books.
Chicago
Bulman O M B, . 1961. Geology inthe service of man # Geology in the service of man. Australia: Penguin Books.
Harvard
Bulman O. M. B., . (1961). Geology inthe service of man # Geology in the service of man. Australia: Penguin Books.
MLA
Bulman O M B, . Geology inthe service of man # Geology in the service of man. Australia: Penguin Books. 1961.