APA (7th ed.) Citation

Robertson, J., & Robertson, J. (1989). Separation and the very young. Free Association Books.

Chicago Style (17th ed.) Citation

Robertson, James, and Joyce Robertson. Separation and the Very Young. London: Free Association Books, 1989.

MLA (9th ed.) Citation

Robertson, James, and Joyce Robertson. Separation and the Very Young. Free Association Books, 1989.

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