Appel, Frank, / author. : Testing with JUnit : master high-quality software development driven by unit tests / Frank Appel. [O'Reilly electronic resource]
Appel, Joachim (Software engineer) / author. : DS8870 data migration techniques / Alexander Warmuth, Bertrand Dufrasne, Joachim Appel, Werner Bauer, Susan Douglass, Peter Klee, Miroslaw Pura, Mark Wells, Bjoern Wesselbaum. [O'Reilly electronic resource]
2015
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Appel, Julie, / author. : Goodnight, starry night / by Julie Appel, Amy Guglielmo.
Appelbaum, Joshua, / author. : The everything guide to sports betting : from pro football to college basketball, systems and strategies for winning money / Josh Appelbaum of The Action Network.
2019
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Appelbaum, Madelyn. : Stress-free performance appraisals : turn your most painful management duty into a powerful motivational tool / Sharon Armstrong, Madelyn Appelbaum ; [edited by Kate Henches]. [O'Reilly electronic resource]