APA (7th ed.) Citation

CROSS, G., & Bradley, M. (1990). Twin and super-twin. University Press.

Chicago Style (17th ed.) Citation

CROSS, Gillian, and Maureen Bradley. Twin and Super-twin. Oxford: University Press, 1990.

MLA (9th ed.) Citation

CROSS, Gillian, and Maureen Bradley. Twin and Super-twin. University Press, 1990.

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