APA (7th ed.) Citation

Humphrey, M., & Humphrey, H. (1988). Families with a difference : varieties of surrogate parenthood / Michael and Heather Humphrey: Varieties of surrogate parenthood. Routledge.

Chicago Style (17th ed.) Citation

Humphrey, Michael, and Heather Humphrey. Families with a Difference : Varieties of Surrogate Parenthood / Michael and Heather Humphrey: Varieties of Surrogate Parenthood. London: Routledge, 1988.

MLA (9th ed.) Citation

Humphrey, Michael, and Heather Humphrey. Families with a Difference : Varieties of Surrogate Parenthood / Michael and Heather Humphrey: Varieties of Surrogate Parenthood. Routledge, 1988.

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