Gaya APA
Hernawati, ., Akhriadi, P. (2005).
A Field Guide to the Nepenthes of Sumatra .
Bogor:
PILI_NGO Movenment and Nepenthes Team.
Gaya MLA
Hernawati, ., Akhriadi, Pitra.
"A Field Guide to the Nepenthes of Sumatra".
Bogor:
PILI_NGO Movenment and Nepenthes Team,
2005.
Text.