Gaya APA
phillips, roger. (1978).
Trees of North America and Europe .
New York:
.
Gaya Chicago
phillips, roger.
Trees of North America and Europe.
New York:
,
1978.
Text.
Gaya MLA
phillips, roger.
Trees of North America and Europe.
New York:
,
1978.
Text.
Gaya Turabian
phillips, roger.
Trees of North America and Europe.
New York:
,
1978.
Print.