Thunderbird Enterprises. (1964). Effluent & water treatment manual (2nd ed.). Thunderbird Enterprises.
Lua i Stíl Chicago (17ú heag.)Thunderbird Enterprises. Effluent & Water Treatment Manual. 2nd ed. London: Thunderbird Enterprises, 1964.
Lua MLA (8ú heag.)Thunderbird Enterprises. Effluent & Water Treatment Manual. 2nd ed. Thunderbird Enterprises, 1964.
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