Gaya APA
Wolker, T, W. (1987).
Reagan Versus The Sandinistas : The Undecleared War on Nicargua (Ed. 5).
Amerika Serikat:
westview press.
Gaya MLA
Wolker, Thomas, W..
"Reagan Versus The Sandinistas : The Undecleared War on Nicargua".
Ed. 5
Amerika Serikat:
westview press,
1987.
Text.