Gaya APA
Mayor, Federico. (1999).
Letters to future generations .
Paris:
United Nations Educational.
Gaya Chicago
Mayor, Federico.
Letters to future generations.
Paris:
United Nations Educational,
1999.
Text.
Gaya MLA
Mayor, Federico.
Letters to future generations.
Paris:
United Nations Educational,
1999.
Text.
Gaya Turabian
Mayor, Federico.
Letters to future generations.
Paris:
United Nations Educational,
1999.
Print.