MLA does not offer specific advice on citing a survey that you have created yourself. However, a survey is essentially a type of interview (MLA 5.7.7), so we suggest that you mirror that format.
Last name, First name. "Name of survey." Survey. DD Month YYYY.
Example of print survey citation:
Smith, John. "Hot Lunch Options." Survey. 6 June 2012.
If the survey or poll was conducted online, follow the instructions in 5.6.2b for "A Work Cited Only on the Web," providing as many of the following elements as you are able.
Example of Web survey citation:
Smith, John. "Hot Lunch Options." Survey. Name of Web Site. Publisher, 6 June 2012. Web. 29 Aug. 2012.