APA Style
Drucker, Peter F.. (1985).
The Effective Executive (1).
USA:
.
Chicago Style
Drucker, Peter F..
The Effective Executive.
1
USA:
,
1985.
Text.
MLA Style
Drucker, Peter F..
The Effective Executive.
1
USA:
,
1985.
Text.
Turabian Style
Drucker, Peter F..
The Effective Executive.
1
USA:
,
1985.
Print.