Gaya APA
Humphreys, Gordon. (1979).
Turning uncertainty to advantage .
UK:
Mc Graw Hill.
Gaya Chicago
Humphreys, Gordon.
Turning uncertainty to advantage.
UK:
Mc Graw Hill,
1979.
Text.
Gaya MLA
Humphreys, Gordon.
Turning uncertainty to advantage.
UK:
Mc Graw Hill,
1979.
Text.
Gaya Turabian
Humphreys, Gordon.
Turning uncertainty to advantage.
UK:
Mc Graw Hill,
1979.
Print.