Naturefriends Great Britain. Naturefriends Great Britain: Bulletin. Sussex: Eric Howell.
芝加哥风格引文Naturefriends Great Britain. Naturefriends Great Britain: Bulletin. Sussex: Eric Howell.
MLA引文Naturefriends Great Britain. Naturefriends Great Britain: Bulletin. Sussex: Eric Howell.
警告：这些引文格式不一定是100％准确.