Dilip Kadam Babu Udupi. (2019). LEARN PENCIL SHADING - BIRDS (2019.). Manoj Publications.
芝加哥风格引文Dilip Kadam Babu Udupi. LEARN PENCIL SHADING - BIRDS. 2019. Manoj Publications, 2019.
MLA引文Dilip Kadam Babu Udupi. LEARN PENCIL SHADING - BIRDS. 2019. Manoj Publications, 2019.
警告：这些引文格式不一定是100％准确.