APA

Ahern C., .The Book Of Tomorrow. New York: HARPER An Imprint Of Harpercollins Publishers, 2009: .

Chicago

Ahern Cecelia, .The Book Of Tomorrow. New York: HARPER An Imprint Of Harpercollins Publishers, 2009: .

Harvard

Ahern C., .The Book Of Tomorrow. New York: HARPER An Imprint Of Harpercollins Publishers, 2009: .

MLA

Ahern Cecelia, .New York: HARPER An Imprint Of Harpercollins Publishers, 2009: . .