APA引文

Peter Freeland. (1991). Focus on biology: Habitats and the environment,investigation. London: Hodder and Stoughton.

Trích dẫn kiểu Chicago

Peter Freeland. Focus On Biology: Habitats and the Environment,investigation. London: Hodder and Stoughton, 1991.

MLA引文

Peter Freeland. Focus On Biology: Habitats and the Environment,investigation. London: Hodder and Stoughton, 1991.

警告：這些引文格式不一定是100％准確.