References – AN 4: The Book of the Fours 
Sutta / Aṅguttara Nikāya / AN 4: Catukkanipāta

AN 4.17: Wrong Courses (1) (1)

AN 4.24: Kāḷaka (1)

AN 4.28: Noble Lineages (1)

AN 4.41: Ways of Developing Immersion Further (3)

AN 4.42: Ways of Answering Questions (1)

AN 4.45: With Rohitassa (2)

AN 4.55: The Same in Living (1) (4)

AN 4.77: Unthinkable (2)

AN 4.94: Immersion (3rd) (2)

AN 4.113: The Goad (1)

AN 4.125: Love (1st) (1)

AN 4.162: In Detail (1)

AN 4.170: In Conjunction (1)

AN 4.179: Extinguishment (2)

AN 4.184: Fearless (1)

AN 4.192: Facts (1)

AN 4.243: Schism in the Saṅgha (4)

AN 4.245: The Benefits of Training (1)