APA (7th ed.) Citation

Filkin, D. (1998). O universo de Stephen Hawking. Alfa.

Chicago Style (17th ed.) Citation

Filkin, David. O Universo De Stephen Hawking. Alfa, 1998.

MLA (8th ed.) Citation

Filkin, David. O Universo De Stephen Hawking. Alfa, 1998.

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