(1978). Facts in focus. Penguin.
Tohutoru Kātū Chicago (17th ed.)Facts in Focus. Harmondsworth: Penguin, 1978.
Tohutoro MLA (9th ed.)Facts in Focus. Penguin, 1978.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.
Tohutoro APA (7th ed.)