APA (7th ed.) Citation

Gallagher, S., & Smith, H. Cars ultimate history: Porsche.

Chicago Style (17th ed.) Citation

Gallagher, Stuart, and Helen Smith. Cars Ultimate History: Porsche.

MLA (8th ed.) Citation

Gallagher, Stuart, and Helen Smith. Cars Ultimate History: Porsche.

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