APA Style
Pakistan Philosophical Congress (6th: 1959: Lahore, Pakistan), Ritchie- David. ().
The Encyclopedia of earthquakes and volcanoes .
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.
Chicago Style
Pakistan Philosophical Congress (6th: 1959: Lahore, Pakistan), Ritchie- David.
The Encyclopedia of earthquakes and volcanoes.
:
,
.
.
MLA Style
Pakistan Philosophical Congress (6th: 1959: Lahore, Pakistan), Ritchie- David.
The Encyclopedia of earthquakes and volcanoes.
:
,
.
.
Turabian Style
Pakistan Philosophical Congress (6th: 1959: Lahore, Pakistan), Ritchie- David.
The Encyclopedia of earthquakes and volcanoes.
:
,
.
.