एपीए उद्धरण

Notholt, A. J. G., & Jarvis, I. (1990). Phosphorite reseatrc and development. Geological Society.

शिकागो स्टाइल उद्धरण

Notholt, A J G., और I. Jarvis. Phosphorite Reseatrc and Development. London: Geological Society, 1990.

एमएलए उद्धरण

Notholt, A J G., और I. Jarvis. Phosphorite Reseatrc and Development. Geological Society, 1990.