Building Your First ArduCopter : 9 Steps (with Pictures) - Instructables
APM Quadcopter Setup : 4 Steps - Instructables
Connect ESCs and Motors — Copter documentation
PDF) Install and Setup the ArduPilot Mega 2 in a Quadcopter Guide to Installation and Setup of the ArduPilot Mega 2 (APM2) controller in a Quadcopter | Salah AL-Hakimi - Academia.edu
Arducopter Quickstart Guides and Tips - Arduino based Arducopter UAV, the open source multi-rotor