APA (7th ed.) Citation

Muller, M. S., Kirango, J., & Rynsburger, J. (1993). An alternative pit latrine emptying system.

Chicago Style (17th ed.) Citation

Muller, Maria S., Jasper Kirango, and Jaap Rynsburger. An Alternative Pit Latrine Emptying System. 1993.

MLA (9th ed.) Citation

Muller, Maria S., et al. An Alternative Pit Latrine Emptying System. 1993.

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