Gaya APA
Havermann, Ernest, Life. (1967).
Life An International Report .
Nederland:
Time-Life International.
Gaya Chicago
Havermann, Ernest, Life.
Life An International Report.
Nederland:
Time-Life International,
1967.
Text.
Gaya MLA
Havermann, Ernest, Life.
Life An International Report.
Nederland:
Time-Life International,
1967.
Text.
Gaya Turabian
Havermann, Ernest, Life.
Life An International Report.
Nederland:
Time-Life International,
1967.
Print.