APA (7th ed.) Citation

Heller, R. (1993). Peter Howson / Robert Heller. Mainstream.

Chicago Style (17th ed.) Citation

Heller, Robert. Peter Howson / Robert Heller. Edinburgh: Mainstream, 1993.

MLA (9th ed.) Citation

Heller, Robert. Peter Howson / Robert Heller. Mainstream, 1993.

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