APA (7th ed.) Citation

Sommer, H. H. (1944). The theory and practice of ice cream making (4th ed.). The author.

Chicago Style (17th ed.) Citation

Sommer, Hugo Henry. The Theory and Practice of Ice Cream Making. 4th ed. Madison, Wis.: The author, 1944.

MLA (9th ed.) Citation

Sommer, Hugo Henry. The Theory and Practice of Ice Cream Making. 4th ed. The author, 1944.