مجموعة: الركن الأكاديمي

By: James Bruce, Harry Harper

By: Karl Römer, Ulrich K. Dreikandt, Claudia Wullenkord

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By: Ahmed Bastawy Ahmed, Ahmed Abdel Salam Elmeligy

By: R. S. Willows

By: Galal A. Hassan

By: Raymond Murphy

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By: Nabil Selim Atalla

By: Isabel L. Beck, Roger C. Farr, Dorothy S. Strickland, Alma Flor Ada, Marcia Brechtel, Margaret Mckeown, Nancy Roser, Hallie Kay Yopp

By: J. K. Johnson

By: David Sang, Mike Follows, Sheila Tarpey

By: L. A. Hill

By: Ladybird Books Ltd

By: Henry Gray, D. V. Davies, F. Davies

By: Wallace E. Herrell

By: Gabriella Oldham

By: J. Duncan, Wh.ex., M.i.mech.e., S. G. Starling, B.sc., A.r.c.sc., F.inst.p.

By: Michael Swan

By: Peter F. Drucker

By: Albert E. Wilkinson

By: Daniel Goleman

By: H.l.b. Moody

By: A.r.b. Etherton

By: J. R. Ewer, G. Latorre

By: R. S. Khurmi

By: Edwin Mansfield

By: John E. Warriner

By: Edwar Nagi Sedra