APA (7th ed.) Citation

Federer, C., & Federer, H. (1940). Splendors of the sky. Sky Pub. Corp..

Chicago Style (17th ed.) Citation

Federer, Charles, and Helen Federer. Splendors of the Sky. Cambridge, Ma: Sky Pub. Corp., 1940.

MLA (9th ed.) Citation

Federer, Charles, and Helen Federer. Splendors of the Sky. Sky Pub. Corp., 1940.