APA (7th ed.) Citation

Umbral, F. (1980). A mortal spring. Harcourt Brace Jovanovich.

Chicago Style (17th ed.) Citation

Umbral, Francisco. A Mortal Spring. New York: Harcourt Brace Jovanovich, 1980.

MLA (9th ed.) Citation

Umbral, Francisco. A Mortal Spring. Harcourt Brace Jovanovich, 1980.