Gaya APA

Cardew, G., Cardew, G. (1995). The Airgun from Trigger to Target . USA: G.V. & G.M. Cardew.

Gaya MLA

Cardew, G.M.., Cardew, G.V.. "The Airgun from Trigger to Target". USA: G.V. & G.M. Cardew, 1995. Buku Text.