APA (7th ed.) Citation

Troya, F. d., & Roberts, M. C. M. (1961). De Madrid al cielo. Harrap.

Chicago Style (17th ed.) Citation

Troya, Francisco de, and Margaret Christine Maud Roberts. De Madrid Al Cielo. Lond.: Harrap, 1961.

MLA (8th ed.) Citation

Troya, Francisco de, and Margaret Christine Maud Roberts. De Madrid Al Cielo. Harrap, 1961.