(1973). Discovering Prince William Forest / [text by Bill Perry ; drawings by Betty Fraser].
Cita Chicago (17th ed.)Discovering Prince William Forest / [text by Bill Perry ; Drawings by Betty Fraser]. 1973.
Cita MLA (9th ed.)Discovering Prince William Forest / [text by Bill Perry ; Drawings by Betty Fraser]. 1973.
Atenció: Aquestes cites poden no estar 100% correctes.