APA-viite

Helvetas, . . .. (1989). Manual of rural water supply (1.). Divyajyothi Prakashan.

Chicago-tyylinen lähdeviittaus

Helvetas,. Manual of Rural Water Supply. 1. Jodhpur: Divyajyothi Prakashan, 1989.

MLA-viite

Helvetas,. Manual of Rural Water Supply. 1. Divyajyothi Prakashan, 1989.