Cita APA (7th ed.)

Megill, R. E. (1988). An introduction to exploration economics (3rd ed.). PennWell Books.

Cita Chicago (17th ed.)

Megill, R. E. An Introduction to Exploration Economics. 3rd ed. Tulsa, Okla: PennWell Books, 1988.

Cita MLA (9th ed.)

Megill, R. E. An Introduction to Exploration Economics. 3rd ed. PennWell Books, 1988.