एपीए उद्धरण

Machado. (1995). Science and Technology. Centre for Earth Science Studies.

शिकागो स्टाइल उद्धरण

Machado. Science and Technology. Thiruvananthapuram: Centre for Earth Science Studies, 1995.

एमएलए उद्धरण

Machado. Science and Technology. Centre for Earth Science Studies, 1995.