Well you link contains the code if you look carefully.
If you call make_layers(cfg['D']) you will obtain a nn.Sequential object containing the feature extractor part of the VGG 16 model (so you can obtain every layers in the right order from this object).
Then for the classifier part, you will find it in the general VGG object definition here:
self.classifier = nn.Sequential(
            nn.Linear(512 * 7 * 7, 4096),
            nn.ReLU(True),
            nn.Dropout(),
            nn.Linear(4096, 4096),
            nn.ReLU(True),
            nn.Dropout(),
            nn.Linear(4096, num_classes),
        )

If you combine those two elements you will have the whole VGG 16 structure. Maybe it will be clearer that way.
Hope this helps.