APA (7th ed.) Citation

Armstrong, R., & Armstrong, R. (1982). El Salvador: The face of revolution. Pluto Pubs.

Chicago Style (17th ed.) Citation

Armstrong, Robert, and Robert;Shenk Armstrong. El Salvador: The Face of Revolution. Pluto Pubs, 1982.

MLA (9th ed.) Citation

Armstrong, Robert, and Robert;Shenk Armstrong. El Salvador: The Face of Revolution. Pluto Pubs, 1982.

Warning: These citations may not always be 100% accurate.