Gaya APA
Northen, Henry T.. (1972).
Greenhouse Gardening. Second Ed .
New york:
The Ronald Press Company.
Gaya Chicago
Northen, Henry T..
Greenhouse Gardening. Second Ed.
New york:
The Ronald Press Company,
1972.
Text.
Gaya MLA
Northen, Henry T..
Greenhouse Gardening. Second Ed.
New york:
The Ronald Press Company,
1972.
Text.
Gaya Turabian
Northen, Henry T..
Greenhouse Gardening. Second Ed.
New york:
The Ronald Press Company,
1972.
Print.