APA (7th ed.) Citation

Andresen, S. d. M. B. (2013). O colar. Porto Editora.

Chicago Style (17th ed.) Citation

Andresen, Sophia de Mello Breyner. O Colar. Porto Editora, 2013.

MLA (8th ed.) Citation

Andresen, Sophia de Mello Breyner. O Colar. Porto Editora, 2013.

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