Gramatica romana structurata logic: Sintaxa - O.G. Popa, editura Complement Control

Engleza - Exercitii de sintaxa - O.G. Popa, editura Complement Control

Sintaxa - Caiet de exercitii - O.G. Popa, editura Complement Control

Morfologia - Caiet de exercitii - O.G. Popa, editura Complement Control

Mercy - O.G. Popa, editura Complement Control

Trei istorii din galaxia Hilsa'n Tassa - O.G. Popa, editura Complement Control

Learn Hardware Firmware and Software Design - O.G. Popa, editura Complement Control

Gramatica romana structurata logic: Morfologia - O.G. Popa, editura Complement Control

Logically Structured English Grammar - O.G. Popa, editura Complement Control

Punctuatia si stilul pe ecran - O.G. Popa, editura Complement Control

Utilizarea computerului pas cu pas - O.G. Popa, editura Complement Control

Engleza - Exercitii de morfologie - O.G. Popa, editura Complement Control