APA (7th ed.) Citation

Picasso, P., Stein, G., & Madeline, L. (2008). Pablo Picasso, Gertrude Stein: Correspondence. Seagull.

Chicago Style (17th ed.) Citation

Picasso, Pablo, Gertrude Stein, and Laurence Madeline. Pablo Picasso, Gertrude Stein: Correspondence. London ; New York: Seagull, 2008.

MLA (9th ed.) Citation

Picasso, Pablo, et al. Pablo Picasso, Gertrude Stein: Correspondence. Seagull, 2008.