Gutierrez, J., & Bisda, A. Technologies appropriate for less developed countries: A survey of literature.
Chicago-viite (17. p.)Gutierrez, Joselito, ja Arsenio Bisda. Technologies Appropriate for Less Developed Countries: A Survey of Literature.
MLA-viite (9. p.)Gutierrez, Joselito, ja Arsenio Bisda. Technologies Appropriate for Less Developed Countries: A Survey of Literature.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.