Gaya APA
Crichton, J., Koster, P. (2006).
English Made Easy: Learning English Through Picture (2).
North Clarendo:
Tuttle Publishing.
Gaya MLA
Crichton, Jonathan., Koster, Pieter.
"English Made Easy: Learning English Through Picture".
2
North Clarendo:
Tuttle Publishing,
2006.
Buku.