APA (7th ed.) Citation

Helder, H. (2015). Poemas Completos. Porto Editora.

Chicago Style (17th ed.) Citation

Helder, Herberto. Poemas Completos. Porto Editora, 2015.

MLA (8th ed.) Citation

Helder, Herberto. Poemas Completos. Porto Editora, 2015.

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