APA (7th ed.) Citation

Ludlum, R., The cry of the halidon, The rhinemann exchange, & Trevayne. (2005). Three great novels. Orion.

Chicago Style (17th ed.) Citation

Ludlum, Robert, The cry of the halidon, The rhinemann exchange, and Trevayne. Three Great Novels. London: Orion, 2005.

MLA (9th ed.) Citation

Ludlum, Robert, et al. Three Great Novels. Orion, 2005.