APA aipamena

Zobel de Ayala, F., Zulueta da Costa, R., & Roxas, J. (1954). Sketchbooks. [publisher not identified].

Chicago Style aipamena

Zobel de Ayala, Fernando, R. Zulueta da Costa, and Jose Roxas. Sketchbooks. Manila: [publisher not identified], 1954.

MLA aipamena

Zobel de Ayala, Fernando, et al. Sketchbooks. [publisher not identified], 1954.