Street Level Graphics. London Gay Guide & Map 1980. Street Level Graphics.
Chicago-Zitierstil (17. Ausg.)Street Level Graphics. London Gay Guide & Map 1980. London: Street Level Graphics.
MLA-Zitierstil (8. Ausg.)Street Level Graphics. London Gay Guide & Map 1980. Street Level Graphics.
警告：这些引文格式不一定是100％准确.