To assure that air traffic flows into and out of an airport in an orderly manner, an airport traffic pattern is established appropriate to the local conditions, including the direction and placement of the pattern, the altitude to be flown, and the procedures for entering and leaving the pattern
AIM 4-1-9 Traffic Advisory Practices at Airports Without Operating Control Towers
AIM 4-3 Airport Operations
PHAK Ch-14 (20) Traffic Patterns
AC 90-66A Recommended Standard Traffic Patterns and Practices for Aeronautical Operations at Airports without Operating Control Towers
AFH Ch-07
Airport Traffic Patterns
Cessna SOPM 2-22 Traffic Pattern Arrival
Cessna SOPM 2-24 Traffic Pattern Departure
Private Pilot ACS Page 19 Task B. Traffic Patterns