@misc{Ammonius_Joachimus_Isagoge,
 author={Ammonius, Joachimus},
 howpublished={online},
 publisher={apud Georgium Rhau},
 language={lat},
 title={Isagoge arithmetices [...]. Cum praefatione Philippi Melan[chthonis]},
 type={starodruk},
 keywords={arytmetyka, matematyka, podręcznik},
}