Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.