Gaya APA
Heyworth, R, M. (2002).
Explore Your World With Science Discover 2 : Theory Workbook .
Semarang:
Pusat Pembinaan Perpus..
Gaya MLA
Heyworth, Rex, M.
"Explore Your World With Science Discover 2 : Theory Workbook".
Semarang:
Pusat Pembinaan Perpus.,
2002.
Text.