APA Style

Smith, Alastair, Wheatley, Maria. (1997). How Are Babies Made? . London: Usborne Publishing Ltd.

Chicago Style

Smith, Alastair, Wheatley, Maria. How Are Babies Made?. London: Usborne Publishing Ltd, 1997. Text.

MLA Style

Smith, Alastair, Wheatley, Maria. How Are Babies Made?. London: Usborne Publishing Ltd, 1997. Text.

Turabian Style

Smith, Alastair, Wheatley, Maria. How Are Babies Made?. London: Usborne Publishing Ltd, 1997. Print.