APA (7th ed.) Citation

Viana, A. M. C. (1959). Mancha solar. Guimarães.

Chicago Style (17th ed.) Citation

Viana, António Manuel Couto. Mancha Solar. Guimarães, 1959.

MLA (8th ed.) Citation

Viana, António Manuel Couto. Mancha Solar. Guimarães, 1959.

Warning: These citations may not always be 100% accurate.