APA (7th ed.) Citation

Metchnikoff, E. (1907). The prolongation of life: Optimistic studies. Heinemann.

Chicago Style (17th ed.) Citation

Metchnikoff, Elie. The Prolongation of Life: Optimistic Studies. London: Heinemann, 1907.

MLA (9th ed.) Citation

Metchnikoff, Elie. The Prolongation of Life: Optimistic Studies. Heinemann, 1907.

Warning: These citations may not always be 100% accurate.