American author Dan Duchaine was known for his outspoken stance against using performance-enhancing substances. He pioneered promoting the use of nutritional supplements to enhance athletic performance. Duchaine's straight-to-the-point information about steroids made him a controversial figure...
Here are a few links that have step by step guides and visual illustrations.
www.spotinjections.com
www.howtodoinjections.com
http://www.lifelinepublications.org/downloads/a27.pdf
1. Intramuscular procedure: http://www.ivf1.com/intramuscular-injections
2. Subcutaneous procedure...