APA (7th ed.) Citation

Armitage, D. (1998). Theories of empire, 1450 - 1800. An expanding world.

Chicago Style (17th ed.) Citation

Armitage, David. "Theories of Empire, 1450 - 1800." An Expanding World 1998.

MLA (8th ed.) Citation

Armitage, David. "Theories of Empire, 1450 - 1800." An Expanding World, 1998.

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