Gaya APA
Humphrey, Donald G.. (1967).
Student guide with programed units for life .
New York:
Harcourt brace & world.
Gaya Chicago
Humphrey, Donald G..
Student guide with programed units for life.
New York:
Harcourt brace & world,
1967.
Tesis.
Gaya MLA
Humphrey, Donald G..
Student guide with programed units for life.
New York:
Harcourt brace & world,
1967.
Tesis.
Gaya Turabian
Humphrey, Donald G..
Student guide with programed units for life.
New York:
Harcourt brace & world,
1967.
Tesis.