BHUSHAN, C. (2013). DO AND LEARN SOCIALLY USEFUL PRODUCTIVE WORK - BOOK 5. PITAMBAR PUBLICATIONS.
Chicago-viite (17. p.)BHUSHAN, CHANDRA. DO AND LEARN SOCIALLY USEFUL PRODUCTIVE WORK - BOOK 5. PITAMBAR PUBLICATIONS, 2013.
MLA-viite (9. p.)BHUSHAN, CHANDRA. DO AND LEARN SOCIALLY USEFUL PRODUCTIVE WORK - BOOK 5. PITAMBAR PUBLICATIONS, 2013.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.