Patient positioning and immobilization in radiation oncology by 
Principles and Practice of Radiation Therapy by 
Perez & Brady's principles and practice of radiation oncology by 
Khan's the physics of radiation therapy by 
Walter and Miller's Textbook of Radiotherapy: Radiation Physics, Therapy and Oncology by 
On target: ensuring geometric accuracy in radiotherapy by 
Practical Radiotherapy Planning by 
The Modern Technology of Radiation Oncology by 
Khan's Treatment Planning in Radiation Oncology by Patient positioning and immobilization in radiation oncology by 
Handbook of Radiotherapy Physics by 