Elif Erbay & Mustafa Ülgen. (1993). The Cephalometrıc Evaluatıon Of The Effects Of Fränkel's Functıon Regulator (Fr-4) Wıth Lıp-Seal Traınıng In The Soft-Tıssue Profıle On The Treatment Of Angle Class I Skeletal Anterıor Open-Bıte Malocclusıon. Galenos Yayinevi.
Chicago Style (17th ed.) CitationElif Erbay and Mustafa Ülgen. The Cephalometrıc Evaluatıon Of The Effects Of Fränkel's Functıon Regulator (Fr-4) Wıth Lıp-Seal Traınıng In The Soft-Tıssue Profıle On The Treatment Of Angle Class I Skeletal Anterıor Open-Bıte Malocclusıon. Galenos Yayinevi, 1993.
MLA (9th ed.) CitationElif Erbay and Mustafa Ülgen. The Cephalometrıc Evaluatıon Of The Effects Of Fränkel's Functıon Regulator (Fr-4) Wıth Lıp-Seal Traınıng In The Soft-Tıssue Profıle On The Treatment Of Angle Class I Skeletal Anterıor Open-Bıte Malocclusıon. Galenos Yayinevi, 1993.