Law, S. K. (2008). DTMF, web- based and coin slot integration for snack vending machine. Universiti Teknikal Malaysia Melaka.
Chicago Style aipamenaLaw, Siaw Koon. DTMF, Web- Based and Coin Slot Integration for Snack Vending Machine. Durian Tunggal: Universiti Teknikal Malaysia Melaka, 2008.
MLA aipamenaLaw, Siaw Koon. DTMF, Web- Based and Coin Slot Integration for Snack Vending Machine. Universiti Teknikal Malaysia Melaka, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.