Gaya APA
Roth, A, C., B, R, J.
(1992).
Small gas engines
.
Illionis:
The Goodheart - Willcox.
Gaya MLA
Roth, Alfred, C., B, Ronald, J.
"Small gas engines".
Illionis:
The Goodheart - Willcox,
1992.
Text.