APA

Keller D. D., Law F., Smallman S. & Tourret S. (2013). Trek Learns About Texture. Chicago, USA: World Book.

Chicago

Keller Donald D, Law Felicia, Smallman Steve and Tourret Shirley. 2013. Trek Learns About Texture. Chicago, USA: World Book.

Harvard

Keller D. D., Law F., Smallman S. and Tourret S. (2013). Trek Learns About Texture. Chicago, USA: World Book.

MLA

Keller Donald D, Law Felicia, Smallman Steve and Tourret Shirley. Trek Learns About Texture. Chicago, USA: World Book. 2013.