APA (7th ed.) Citation

Zobel de Ayala, F. (1954). Sketchbooks. [s.n.].

Chicago Style (17th ed.) Citation

Zobel de Ayala, Fernando. Sketchbooks. Manila: [s.n.], 1954.

MLA (9th ed.) Citation

Zobel de Ayala, Fernando. Sketchbooks. [s.n.], 1954.