APA (7th ed.) Citation

Books, Y., & Soeiro, t. C. Porquê? Yoyo Books.

Chicago Style (17th ed.) Citation

Books, Yoyo, and trad. Cristina Soeiro. Porquê? Yoyo Books.

MLA (8th ed.) Citation

Books, Yoyo, and trad. Cristina Soeiro. Porquê? Yoyo Books.

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