APA (7th ed.) Citation

Beal, c. G., & Tregenza, i. M. (1977). A energia. Formar.

Chicago Style (17th ed.) Citation

Beal, compil. George, and il. Mike Tregenza. A Energia. Formar, 1977.

MLA (8th ed.) Citation

Beal, compil. George, and il. Mike Tregenza. A Energia. Formar, 1977.

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