Gaya APA
Martel, Leon. (1987).
Mastering change .
America:
Mentor Trademark Reg.
Gaya Chicago
Martel, Leon.
Mastering change.
America:
Mentor Trademark Reg,
1987.
Text.
Gaya MLA
Martel, Leon.
Mastering change.
America:
Mentor Trademark Reg,
1987.
Text.
Gaya Turabian
Martel, Leon.
Mastering change.
America:
Mentor Trademark Reg,
1987.
Print.