Cita APA

Alan Richards. (1998). Birds of grey: Hunters of the sky. Philadelphia, Pennsylvania: Courage Books.

Chicago Style Citation

Alan Richards. Birds of Grey: Hunters of the Sky. Philadelphia, Pennsylvania: Courage Books, 1998.

Cita MLA

Alan Richards. Birds of Grey: Hunters of the Sky. Philadelphia, Pennsylvania: Courage Books, 1998.

Atenció: Aquestes cites poden no estar 100% correctes.