APA (7th ed.) Citation

Humprey, D. d. I. d. (1975). Singer, why do you sing. [publisher not identified].

Chicago Style (17th ed.) Citation

Humprey, Dolores de Iruretagoyena de. Singer, Why Do You Sing. Manila: [publisher not identified], 1975.

MLA (9th ed.) Citation

Humprey, Dolores de Iruretagoyena de. Singer, Why Do You Sing. [publisher not identified], 1975.