Cita APA (7th ed.)

Melville, A., & Johnson, C. (1988). Immunity plus: How to be healthy in the age of new infections / Arabella Melville and Colin Johnson. Penguin.

Cita Chicago (17th ed.)

Melville, Arabella, i Colin Johnson. Immunity Plus: How to Be Healthy in the Age of New Infections / Arabella Melville and Colin Johnson. London: Penguin, 1988.

Cita MLA (8th ed.)

Melville, Arabella, i Colin Johnson. Immunity Plus: How to Be Healthy in the Age of New Infections / Arabella Melville and Colin Johnson. Penguin, 1988.