APA (7th ed.) Citation

Spengler, J. J. (1972). Population economics: Selected essays of Joseph John Spengler. Duke University Press.

Chicago Style (17th ed.) Citation

Spengler, Joseph John. Population Economics: Selected Essays of Joseph John Spengler. Durham, North Carolina: Duke University Press, 1972.

MLA (9th ed.) Citation

Spengler, Joseph John. Population Economics: Selected Essays of Joseph John Spengler. Duke University Press, 1972.