Cita APA (7a ed.)
(1991). Word power: The world book : Obs. Vol.1.:, Language, s.1-194. Vol.2.:, Writing and speaking, s.197-532 (1.vyd.). The World Book,Inc.
Cita Chicago Style (17a ed.)
Word Power: The World Book : Obs. Vol.1.:, Language, S.1-194. Vol.2.:, Writing and Speaking, S.197-532. 1.vyd. Chicago: The World Book,Inc, 1991.
Cita MLA (9a ed.)
Word Power: The World Book : Obs. Vol.1.:, Language, S.1-194. Vol.2.:, Writing and Speaking, S.197-532. 1.vyd. The World Book,Inc, 1991.
Precaución: Estas citas no son 100% exactas.