APA Style
Chopra,G.L. (1990).
Gymnosperms (Twelveth Edition) .
Lahore:
Unique Publishers, Lahore.
Chicago Style
Chopra,G.L.
Gymnosperms (Twelveth Edition).
Lahore:
Unique Publishers, Lahore,
1990.
.
MLA Style
Chopra,G.L.
Gymnosperms (Twelveth Edition).
Lahore:
Unique Publishers, Lahore,
1990.
.
Turabian Style
Chopra,G.L.
Gymnosperms (Twelveth Edition).
Lahore:
Unique Publishers, Lahore,
1990.
.