Books

• NCERT Science Lab Manual Class 6 - 8  
• NCERT Science Textbook Class  6 - 8 

Websites

• https://ncert.nic.in/pdf/publication/sciencelaboratorymanuals/classVItoVIII/science/fhelm202.pdf  (Page No: 10, Activity - 3)
• https://www.britannica.com/science/stomate
• https://www.sciencedirect.com/topics/earth-and-planetary-sciences/stomata