APA Style
The encyclopedia americana international edition no 21. (1977).
Canada:
Grolier Limited.
Chicago Style
The encyclopedia americana international edition no 21.
Volume 21.
Canada:
Grolier Limited,
1977.
.
MLA Style
The encyclopedia americana international edition no 21.
Volume 21.
Canada:
Grolier Limited,
1977.
.
Turabian Style
The encyclopedia americana international edition no 21.
Canada:
Grolier Limited,
1977.
.