Is it acceptable to cite commonly used definitions from Mathworld.Wolfram.com?

I am writing a document/article for the average layman, with the aim of explaining certain well known results in mathematics while glossing over the more gritty details.

I'm going to include several references as "Further Readings" where I cite my sources for the definitions I use for mathematical terms such as graph, surface, pair, etc, and certain minor results I expect the reader to assume for the sake of brevity.

For this reason, I was thinking of citing articles on Mathworld.Wolfram.com for simple definitions. Do you think this is a good idea? Should I simply cite well known books instead of online encyclopedias such as Mathworld?

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