Gaya APA
Trochim, William M.K. (2008).
The research methods knowledge base 3 rd ed .
Mason:
Cengage Learning.
Gaya Chicago
Trochim, William M.K.
The research methods knowledge base 3 rd ed.
Mason:
Cengage Learning,
2008.
Text.
Gaya MLA
Trochim, William M.K.
The research methods knowledge base 3 rd ed.
Mason:
Cengage Learning,
2008.
Text.
Gaya Turabian
Trochim, William M.K.
The research methods knowledge base 3 rd ed.
Mason:
Cengage Learning,
2008.
Print.