APA Style

Walker, Richardd. (2003). Genes & DNA . Kingfisher: Kingfisher.

Chicago Style

Walker, Richardd. Genes & DNA. Kingfisher: Kingfisher, 2003. TXB.

MLA Style

Walker, Richardd. Genes & DNA. Kingfisher: Kingfisher, 2003. TXB.

Turabian Style

Walker, Richardd. Genes & DNA. Kingfisher: Kingfisher, 2003. TXB.