Gaya APA

Siegel, C, W, S, D, S. (2020). Building an Effective Security Program . : Walter de Gruyter GmbH & Co KG.

Gaya MLA

Siegel, Chris, Williams;, Scott, Donaldson;, Stanley. "Building an Effective Security Program". : Walter de Gruyter GmbH & Co KG, 2020. Text.