APA (7th ed.) Citation

Billings, W., & Nathan, H. (1961). The continental harmony. Harvard University Press.

Chicago Style (17th ed.) Citation

Billings, William, and Hans Nathan. The Continental Harmony. Cambridge, Massachusetts: Harvard University Press, 1961.

MLA (9th ed.) Citation

Billings, William, and Hans Nathan. The Continental Harmony. Harvard University Press, 1961.