Gaya APA
Turk, Jonathan, Turk, Amos, Arms, Karen. (1978).
Environmental science (3th.ed).
USA:
Saunders College.
Gaya Chicago
Turk, Jonathan, Turk, Amos, Arms, Karen.
Environmental science.
3th.ed
USA:
Saunders College,
1978.
Text.
Gaya MLA
Turk, Jonathan, Turk, Amos, Arms, Karen.
Environmental science.
3th.ed
USA:
Saunders College,
1978.
Text.
Gaya Turabian
Turk, Jonathan, Turk, Amos, Arms, Karen.
Environmental science.
3th.ed
USA:
Saunders College,
1978.
Print.